Purtymun, W.D. Dispersion and movement of tritium in a shallow aquifer in Mortandad Canyon at the Los Alamos Scientific Laboratory, report, September 1, 1974; (https://digital.library.unt.edu/ark:/67531/metadc1016815/m1/1/: accessed April 26, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .